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<title>NavigationDelayInterceptor.swift - Slather</title>
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<h2 class="cov_title">
<span>Coverage for "NavigationDelayInterceptor.swift" : </span><span class="cov_high">100.00%</span>
</h2>
<h4 class="cov_subtitle">(31 of 31 relevant lines covered)</h4>
<h4 class="cov_filepath">RouteComposer/Classes/Extra/NavigationDelayInterceptor.swift</h4>
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<td class="num">1</td>
<td class="src"><pre><code class="objc">//</code></pre></td>
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<td class="num">2</td>
<td class="src"><pre><code class="objc">// RouteComposer</code></pre></td>
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<td class="num">3</td>
<td class="src"><pre><code class="objc">// NavigationDelayInterceptor.swift</code></pre></td>
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<td class="num">4</td>
<td class="src"><pre><code class="objc">// https://github.com/ekazaev/route-composer</code></pre></td>
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<td class="num">5</td>
<td class="src"><pre><code class="objc">//</code></pre></td>
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<td class="num">6</td>
<td class="src"><pre><code class="objc">// Created by Eugene Kazaev in 2018-2022.</code></pre></td>
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<td class="num">7</td>
<td class="src"><pre><code class="objc">// Distributed under the MIT license.</code></pre></td>
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<td class="num">8</td>
<td class="src"><pre><code class="objc">//</code></pre></td>
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<td class="num">9</td>
<td class="src"><pre><code class="objc"></code></pre></td>
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<td class="num">10</td>
<td class="src"><pre><code class="objc">import Foundation</code></pre></td>
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<td class="num">11</td>
<td class="src"><pre><code class="objc">import UIKit</code></pre></td>
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<td class="num">12</td>
<td class="src"><pre><code class="objc"></code></pre></td>
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<td class="num">13</td>
<td class="src"><pre><code class="objc">/// `NavigationDelayingInterceptor` delays the router from starting the navigation, while any view controllers in the</code></pre></td>
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<td class="num">14</td>
<td class="src"><pre><code class="objc">/// stack are being presented or dismissed. In case your app has some other navigation&nbsp;instruments rather than</code></pre></td>
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<tr class="never">
<td class="num">15</td>
<td class="src"><pre><code class="objc">/// `RouteComposer` or you have a situation when a few routers work simultaneously, add it to your **router** to avoid</code></pre></td>
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<td class="num">16</td>
<td class="src"><pre><code class="objc">/// the router not being able to navigate to the destination because a view controller in the stack is</code></pre></td>
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<tr class="never">
<td class="num">17</td>
<td class="src"><pre><code class="objc">/// being presented or dismissed.</code></pre></td>
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<td class="num">18</td>
<td class="src"><pre><code class="objc">///</code></pre></td>
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<td class="num">19</td>
<td class="src"><pre><code class="objc">/// *NB: `UIKit` does not allow simultaneous changes in `UIViewController` stack. The `.wait` strategy does not</code></pre></td>
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<td class="num">20</td>
<td class="src"><pre><code class="objc">/// guarantee 100% protection from all possible situations. The code must be written in a way that avoids such</code></pre></td>
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<td class="num">21</td>
<td class="src"><pre><code class="objc">/// situations. The `.wait` strategy can be used only as a temporary solution.*</code></pre></td>
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<tr class="never">
<td class="num">22</td>
<td class="src"><pre><code class="objc">public struct NavigationDelayingInterceptor&lt;Context&gt;: RoutingInterceptor {</code></pre></td>
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<td class="num">23</td>
<td class="src"><pre><code class="objc"></code></pre></td>
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<td class="num">24</td>
<td class="src"><pre><code class="objc">    // MARK: Internal entities</code></pre></td>
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<td class="num">25</td>
<td class="src"><pre><code class="objc"></code></pre></td>
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<td class="num">26</td>
<td class="src"><pre><code class="objc">    /// The strategy to be used by `NavigationDelayingInterceptor`</code></pre></td>
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<td class="num">27</td>
<td class="src"><pre><code class="objc">    ///</code></pre></td>
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<td class="num">28</td>
<td class="src"><pre><code class="objc">    /// - wait: Wait while some `UIViewController` is being presented or dismissed.</code></pre></td>
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<tr class="never">
<td class="num">29</td>
<td class="src"><pre><code class="objc">    /// - abort:  Abort tha navigation if some `UIViewController` is being presented or dismissed.</code></pre></td>
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<tr class="never">
<td class="num">30</td>
<td class="src"><pre><code class="objc">    public enum Strategy {</code></pre></td>
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<td class="num">31</td>
<td class="src"><pre><code class="objc"></code></pre></td>
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<tr class="never">
<td class="num">32</td>
<td class="src"><pre><code class="objc">        /// Abort tha navigation if some `UIViewController` is being presented or dismissed.</code></pre></td>
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<tr class="never">
<td class="num">33</td>
<td class="src"><pre><code class="objc">        case abort</code></pre></td>
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<td class="num">34</td>
<td class="src"><pre><code class="objc"></code></pre></td>
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<tr class="never">
<td class="num">35</td>
<td class="src"><pre><code class="objc">        /// Wait while some `UIViewController` is being presented or dismissed.</code></pre></td>
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<tr class="never">
<td class="num">36</td>
<td class="src"><pre><code class="objc">        case wait</code></pre></td>
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<tr class="never">
<td class="num">37</td>
<td class="src"><pre><code class="objc"></code></pre></td>
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<tr class="never">
<td class="num">38</td>
<td class="src"><pre><code class="objc">    }</code></pre></td>
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<tr class="never">
<td class="num">39</td>
<td class="src"><pre><code class="objc"></code></pre></td>
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<tr class="never">
<td class="num">40</td>
<td class="src"><pre><code class="objc">    // MARK: Properties</code></pre></td>
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<td class="num">41</td>
<td class="src"><pre><code class="objc"></code></pre></td>
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<td class="num">42</td>
<td class="src"><pre><code class="objc">    /// `WindowProvider` instance.</code></pre></td>
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<td class="num">43</td>
<td class="src"><pre><code class="objc">    public let windowProvider: WindowProvider</code></pre></td>
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<td class="num">44</td>
<td class="src"><pre><code class="objc"></code></pre></td>
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<td class="num">45</td>
<td class="src"><pre><code class="objc">    /// `Logger` instance.</code></pre></td>
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<td class="num">46</td>
<td class="src"><pre><code class="objc">    public let logger: Logger?</code></pre></td>
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<tr class="never">
<td class="num">47</td>
<td class="src"><pre><code class="objc"></code></pre></td>
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<tr class="never">
<td class="num">48</td>
<td class="src"><pre><code class="objc">    /// Type of `Strategy`.</code></pre></td>
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<tr class="never">
<td class="num">49</td>
<td class="src"><pre><code class="objc">    public let strategy: Strategy</code></pre></td>
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<tr class="never">
<td class="num">50</td>
<td class="src"><pre><code class="objc"></code></pre></td>
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<tr class="never">
<td class="num">51</td>
<td class="src"><pre><code class="objc">    // MARK: Methods</code></pre></td>
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<td class="num">52</td>
<td class="src"><pre><code class="objc"></code></pre></td>
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<tr class="never">
<td class="num">53</td>
<td class="src"><pre><code class="objc">    /// Constructor</code></pre></td>
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<tr class="never">
<td class="num">54</td>
<td class="src"><pre><code class="objc">    ///</code></pre></td>
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<tr class="never">
<td class="num">55</td>
<td class="src"><pre><code class="objc">    /// - Parameters:</code></pre></td>
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<tr class="never">
<td class="num">56</td>
<td class="src"><pre><code class="objc">    ///   - windowProvider: `WindowProvider` instance.</code></pre></td>
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<tr class="never">
<td class="num">57</td>
<td class="src"><pre><code class="objc">    ///   - strategy: Type of `Strategy` to be used.</code></pre></td>
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</tr>
<tr class="never">
<td class="num">58</td>
<td class="src"><pre><code class="objc">    ///   - logger: `Logger` instance.</code></pre></td>
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</tr>
<tr class="never">
<td class="num">59</td>
<td class="src"><pre><code class="objc">    public init(windowProvider: WindowProvider = RouteComposerDefaults.shared.windowProvider,</code></pre></td>
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<tr class="never">
<td class="num">60</td>
<td class="src"><pre><code class="objc">                strategy: Strategy = .abort,</code></pre></td>
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<tr class="covered">
<td class="num">61</td>
<td class="src"><pre><code class="objc">                logger: Logger? = RouteComposerDefaults.shared.logger) {</code></pre></td>
<td class="coverage">14x</td>
</tr>
<tr class="covered">
<td class="num">62</td>
<td class="src"><pre><code class="objc">        self.windowProvider = windowProvider</code></pre></td>
<td class="coverage">14x</td>
</tr>
<tr class="covered">
<td class="num">63</td>
<td class="src"><pre><code class="objc">        self.logger = logger</code></pre></td>
<td class="coverage">14x</td>
</tr>
<tr class="covered">
<td class="num">64</td>
<td class="src"><pre><code class="objc">        self.strategy = strategy</code></pre></td>
<td class="coverage">14x</td>
</tr>
<tr class="covered">
<td class="num">65</td>
<td class="src"><pre><code class="objc">    }</code></pre></td>
<td class="coverage">14x</td>
</tr>
<tr class="never">
<td class="num">66</td>
<td class="src"><pre><code class="objc"></code></pre></td>
<td class="coverage"></td>
</tr>
<tr class="covered">
<td class="num">67</td>
<td class="src"><pre><code class="objc">    public func perform(with context: Context, completion: @escaping (RoutingResult) -&gt; Void) {</code></pre></td>
<td class="coverage">105x</td>
</tr>
<tr class="covered">
<td class="num">68</td>
<td class="src"><pre><code class="objc">        guard let topmostViewController = getTopmostViewController(),</code></pre></td>
<td class="coverage">105x</td>
</tr>
<tr class="covered">
<td class="num">69</td>
<td class="src"><pre><code class="objc">              topmostViewController.isBeingDismissed || topmostViewController.isBeingPresented else {</code></pre></td>
<td class="coverage">105x</td>
</tr>
<tr class="covered">
<td class="num">70</td>
<td class="src"><pre><code class="objc">            completion(.success)</code></pre></td>
<td class="coverage">100x</td>
</tr>
<tr class="covered">
<td class="num">71</td>
<td class="src"><pre><code class="objc">            return</code></pre></td>
<td class="coverage">100x</td>
</tr>
<tr class="covered">
<td class="num">72</td>
<td class="src"><pre><code class="objc">        }</code></pre></td>
<td class="coverage">100x</td>
</tr>
<tr class="covered">
<td class="num">73</td>
<td class="src"><pre><code class="objc">        guard strategy == .wait else {</code></pre></td>
<td class="coverage">5x</td>
</tr>
<tr class="covered">
<td class="num">74</td>
<td class="src"><pre><code class="objc">            completion(.failure(RoutingError.compositionFailed(.init("\(topmostViewController) is changing its state. Navigation has been aborted."))))</code></pre></td>
<td class="coverage">1x</td>
</tr>
<tr class="covered">
<td class="num">75</td>
<td class="src"><pre><code class="objc">            return</code></pre></td>
<td class="coverage">1x</td>
</tr>
<tr class="covered">
<td class="num">76</td>
<td class="src"><pre><code class="objc">        }</code></pre></td>
<td class="coverage">4x</td>
</tr>
<tr class="covered">
<td class="num">77</td>
<td class="src"><pre><code class="objc"></code></pre></td>
<td class="coverage">4x</td>
</tr>
<tr class="covered">
<td class="num">78</td>
<td class="src"><pre><code class="objc">        logger?.log(.info("\(topmostViewController) is changing its state. Navigation has been postponed."))</code></pre></td>
<td class="coverage">4x</td>
</tr>
<tr class="covered">
<td class="num">79</td>
<td class="src"><pre><code class="objc">        let deadline = DispatchTime.now() + .milliseconds(100)</code></pre></td>
<td class="coverage">4x</td>
</tr>
<tr class="covered">
<td class="num">80</td>
<td class="src"><pre><code class="objc">        DispatchQueue.main.asyncAfter(deadline: deadline) {</code></pre></td>
<td class="coverage">4x</td>
</tr>
<tr class="covered">
<td class="num">81</td>
<td class="src"><pre><code class="objc">            self.perform(with: context, completion: completion)</code></pre></td>
<td class="coverage">4x</td>
</tr>
<tr class="covered">
<td class="num">82</td>
<td class="src"><pre><code class="objc">        }</code></pre></td>
<td class="coverage">4x</td>
</tr>
<tr class="covered">
<td class="num">83</td>
<td class="src"><pre><code class="objc">    }</code></pre></td>
<td class="coverage">4x</td>
</tr>
<tr class="never">
<td class="num">84</td>
<td class="src"><pre><code class="objc"></code></pre></td>
<td class="coverage"></td>
</tr>
<tr class="covered">
<td class="num">85</td>
<td class="src"><pre><code class="objc">    private func getTopmostViewController() -&gt; UIViewController? {</code></pre></td>
<td class="coverage">105x</td>
</tr>
<tr class="covered">
<td class="num">86</td>
<td class="src"><pre><code class="objc">        var topmostViewController = windowProvider.window?.rootViewController</code></pre></td>
<td class="coverage">105x</td>
</tr>
<tr class="covered">
<td class="num">87</td>
<td class="src"><pre><code class="objc"></code></pre></td>
<td class="coverage">105x</td>
</tr>
<tr class="covered">
<td class="num">88</td>
<td class="src"><pre><code class="objc">        while let presentedViewController = topmostViewController?.presentedViewController {</code></pre></td>
<td class="coverage">105x</td>
</tr>
<tr class="covered">
<td class="num">89</td>
<td class="src"><pre><code class="objc">            topmostViewController = presentedViewController</code></pre></td>
<td class="coverage">41x</td>
</tr>
<tr class="covered">
<td class="num">90</td>
<td class="src"><pre><code class="objc">        }</code></pre></td>
<td class="coverage">105x</td>
</tr>
<tr class="covered">
<td class="num">91</td>
<td class="src"><pre><code class="objc"></code></pre></td>
<td class="coverage">105x</td>
</tr>
<tr class="covered">
<td class="num">92</td>
<td class="src"><pre><code class="objc">        return topmostViewController</code></pre></td>
<td class="coverage">105x</td>
</tr>
<tr class="covered">
<td class="num">93</td>
<td class="src"><pre><code class="objc">    }</code></pre></td>
<td class="coverage">105x</td>
</tr>
<tr class="never">
<td class="num">94</td>
<td class="src"><pre><code class="objc"></code></pre></td>
<td class="coverage"></td>
</tr>
<tr class="never">
<td class="num">95</td>
<td class="src"><pre><code class="objc">}</code></pre></td>
<td class="coverage"></td>
</tr>
</table>
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